# Elasticsearch suddenly unavailable

**URL:** <https://discuss.elastic.co/t/elasticsearch-suddenly-unavailable/267153>\
**Category:** Elasticsearch\
**Created:** [March 13, 2021, 5:10pm UTC](https://discuss.elastic.co/t/elasticsearch-suddenly-unavailable/267153 "2021-03-13T17:10:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cdalexndr](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cdalexndr/32/55274_2.png) [@cdalexndr](https://discuss.elastic.co/u/cdalexndr)\
**Post date:** [March 13, 2021, 5:10pm UTC](https://discuss.elastic.co/t/elasticsearch-suddenly-unavailable/267153/1 "2021-03-13T17:10:23Z")

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After some time, the service suddenly doesn't work...  
`org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/1/state not recovered / initialized];`

I'm using a single node instance, ES 7.10.1.  
Also, I set `index.number_of_replicas: 0` , but in normal conditions there should be no failure so no reason to duplicate disk space for replica.

Log is rather large and I don't know for what to look.  
How can I provide the logs here? I cannot attach it as a file, and cannot post large text here due to limits...

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<div class="post-metadata">

**Author:** ![cdalexndr](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cdalexndr/32/55274_2.png) [@cdalexndr](https://discuss.elastic.co/u/cdalexndr)\
**Post date:** [March 13, 2021, 7:32pm UTC](https://discuss.elastic.co/t/elasticsearch-suddenly-unavailable/267153/2 "2021-03-13T19:32:40Z")

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It seems that it was killed by oom, resulting in corrupted data:

```
Mar 13 06:26:16 li1401-73 kernel: [2453688.445741] elasticsearch[s invoked oom-killer: gfp_mask=0x24200ca(GFP_HIGHUSER_MOVABLE), nodemask=0, order=0, oom_score_adj=0
Mar 13 06:26:16 li1401-73 kernel: [2453688.448755] elasticsearch[s cpuset=62454fa27a815428ef8f2e2716414b9e6fc3777fc6eae0b25f8a7d7093dbd409 mems_allowed=0
Mar 13 06:26:16 li1401-73 kernel: [2453688.450437] CPU: 0 PID: 7073 Comm: elasticsearch[s Tainted: G O 4.9.0-14-amd64 #1 Debian 4.9.246-2
```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 10, 2021, 7:32pm UTC](https://discuss.elastic.co/t/elasticsearch-suddenly-unavailable/267153/3 "2021-04-10T19:32:40Z")

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